Control Pwm

how do i reduce the fan speed, in amibios, on as rock 4coredual-vsta motherboard?
the cpu fan has a 4 pin pwm control, im in amibios where you can tell the pc how hot the cpu can get before it should increase the speed of the fan.
The cpu fan im using is a Zalman cnps 9500, which should be able to operate between 1350rpm and 2650 rpm, but even with the pwm temperature set at the maximum it still has the fan spinning at its highest, how do you reduce the speed of the fan, there are no controls for reducing voltage.
Im considering going for a new motherboard which has greater control over the pwm speed of the cpu fan, any recommendations?, i have only about £50 to spend.
to control your fan speed you can use a program called speedfan it will automatically speed up the fan speed when things get to warm and slow it down when things cool off a little you can download it here http://www.softpedia.com/get/System/System-Info/SpeedFan.shtml
HHO PWM Control Test
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Temperature Auto Control PWM HHO Controller 12-30V 30A $68.00 |
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12V 15A DC Motor Speed Control PWM HHO RC Controller $17.49 |
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GALIL MOTION CONTROL 25A8E-GAL PWM SERVO AMPLIFIER $189.00 |
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12-40V 17A 200W DC Motor Speed Control PWM Controller $28.00 |
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24V-10A 120W PWM solar panel charge control regulator-a $14.42 |
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12V/24V-10A PWM solar panel charger control regulator-a $19.84 |
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PWM & Dual Linear Power Control IC HIP6016 / HIP6016CB $3.99 |
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12-40V 17A 200W DC Motor Speed Control PWM Controller $24.80 |
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12-40V 7A 80W DC Motor Speed Control PWM Controller $16.00 |
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Reversible DC Motor Speed Control PWM Controller 80W $24.90 |
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DC Motor Speed Control HHO PWM 30A Max Frequency Adjust $38.00 |
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12-40V 7A 80W DC Motor Speed Control PWM Controller $18.00 |
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2ea Advanced Motion Controls PWM Servo Amplifier B12A6B $149.99 |
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ADVANCED MOTION CONTROLS BRUSH TYPE PWM SERVO AMPLIFIER $9.99 |
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CRITICAL TATTOO CX-2 DIGITAL PWM CONTROL STATION $47.00 |
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12-40V 100A 1200W DC Motor Speed Control PWM Controller $66.00 |
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12-40V 60A 720W DC Motor Speed Control PWM Controller $58.00 |
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12V 30A 360W DC Motor Speed Control PWM Controller $39.00 |
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24V 20A 480W DC Motor Speed Control PWM Controller $36.00 |
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Reversible 60W DC Motor Speed Control PWM Controller $24.80 |
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12-40V 7A 80W DC Motor Speed Control PWM Controller $13.00 |
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IBM Advanced Motion Controls PWM Servo B12A6L $55.00 |
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24V-10A 120W PWM solar panel charge control regulator-a $14.42 |
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TL594CN Pulse Width Modulation PWM Control Circuit (10) $12.99 |
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12-40V 100A 1200W DC Motor Speed Control PWM Controller $68.00 |
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12-40V 30A 360W DC Motor Speed Control PWM Controller $31.00 |
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12-40V 7A 80W DC Motor Speed Control PWM Controller $18.00 |
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Advanced Motion Controls Brush Type PWM Servo Amplifier $180.00 |
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12V/24V-10A PWM solar panel charger control regulator-a $14.42 |
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12-40V 17A 200W DC Motor Speed Control PWM Controller $24.80 |
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12-40V 7A 80W DC Motor Speed Control PWM Controller $16.00 |
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Reversible 60W DC Motor Speed Control PWM Controller $24.80 |
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NCP1351BDR [NCP1351] Variable Off Time PWM Control IC $6.88 |
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TL594CN Pulse Width Modulation PWM Control Circuit (20) $22.99 |
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ADVANCED MOTION CONTROL BRUSHLESS PWM SERVO AMPLIFIER $35.00 |
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NTE Electronics NTE7096 INTEGRATED CIRCUIT -PWM CONTROL $10.95 |
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Galil Motion Control 25A8K-GAL Brush PWM Servo Amp. $149.00 |
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Temperature Auto Control PWM HHO Controller 12-30V 30A $68.00 |
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12V 30A DC Motor Speed Control PWM HHO RC Controller $29.99 |
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12V 15A DC Motor Speed Control PWM HHO Controller 180w $18.99 |
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Copley controls PWM DC Brushless Servo Amplifier 7227DC $399.00 |
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Copley Controls PWM AC Brushless Servo Amplifier 7228AC $590.00 |
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Graham PWM Control Model 1102-D $35.95 |
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24V-10A 120W PWM solar panel charge control regulator-a $14.42 |
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PWM DC MOTOR SPEED CONTROL 30 AMP 12-24 VOLT $19.99 |
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Reversible 80W DC Motor Speed Control PWM Controller $24.90 |
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12V 30A 360W DC Motor Speed Control PWM Controller $39.00 |
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12-40V 7A 80W DC Motor Speed Control PWM Controller $16.00 |
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DC Motor Speed Control HHO / PWM 12V/24V 15A Max $20.00 |
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15/30 AMP PWM DC SPEED CONTROL FREQUENCY ADJUSTMENT KIT $14.95 |






